The crucial step in the conversion of solar to chemical energy in photosynthesis takes place in the reaction center, where the absorbed excitation energy is converted into a stable charge-separated state by ultrafast electron transfer events. However, the fundamental mechanisms responsible for efficiency of this process are still largely unknown. Thanks to the development of 2D electronic spectroscopy, several experimental pieces of evidence have been provided suggesting that the coherent transfer of electronic wave-packets is an essential step. These findings are raising questions also about the role of quantum coherence in artificial devices, but only few papers have been devoted to the investigation on artificial analogues of biological complexes. One of the key challenges for the future will be to learn how to construct artificial molecular materials enabling the harvesting of sunlight exploiting quantum effects. Here we will report the synthesis and experimental investigations on an innovative bodipy-type multicromophoric self-assembly system. The synthetic strategies for two sets of bodipy building blocks bearing rigidly linked peripheral complementary triple hydrogen bonding moieties, will be presented. The experimental data on the spectroscopic characterization of the heterodimer and the preliminary studies of electron transfer with 2D technique, will be shown.

Synthesis of BODIPY Heterodimer formed by hydrogen bonding for electronic transfer investigations

Massimiliano Cordaro
Writing – Original Draft Preparation
;
Luigi Monsù Scolaro
Supervision
;
2019-01-01

Abstract

The crucial step in the conversion of solar to chemical energy in photosynthesis takes place in the reaction center, where the absorbed excitation energy is converted into a stable charge-separated state by ultrafast electron transfer events. However, the fundamental mechanisms responsible for efficiency of this process are still largely unknown. Thanks to the development of 2D electronic spectroscopy, several experimental pieces of evidence have been provided suggesting that the coherent transfer of electronic wave-packets is an essential step. These findings are raising questions also about the role of quantum coherence in artificial devices, but only few papers have been devoted to the investigation on artificial analogues of biological complexes. One of the key challenges for the future will be to learn how to construct artificial molecular materials enabling the harvesting of sunlight exploiting quantum effects. Here we will report the synthesis and experimental investigations on an innovative bodipy-type multicromophoric self-assembly system. The synthetic strategies for two sets of bodipy building blocks bearing rigidly linked peripheral complementary triple hydrogen bonding moieties, will be presented. The experimental data on the spectroscopic characterization of the heterodimer and the preliminary studies of electron transfer with 2D technique, will be shown.
2019
978-3-9504809-2-4
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/3142796
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